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In vitro exposure system using magnetic resonant coupling wireless power transfer

Published online by Cambridge University Press:  20 November 2014

Kohei Mizuno ,
Junji Miyakoshi  and
Naoki Shinohara
Kohei Mizuno*
Affiliation:
Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto 6110011, Japan. Phone: +81 774 38 4954
Junji Miyakoshi
Affiliation:
Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto 6110011, Japan. Phone: +81 774 38 4954
Naoki Shinohara
Affiliation:
Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto 6110011, Japan. Phone: +81 774 38 4954
*
Corresponding author: K. Mizuno Email: [email protected]
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Abstract

Wireless power transfer (WPT) technology using the resonant coupling phenomenon has been widely studied. However, possible relationships between WPT exposure and human health have not been experimentally evaluated. In this study, we developed a new in vitro exposure system to evaluate the biological effects of magnetic resonant coupling WPT. The WPT was carried out using a self-resonant helical coil, which was designed to transfer the power with 85.4% efficiency at a 12.5 MHz resonant frequency. The magnetic field at the positions of the cell culture dishes is approximately twice the reference level for occupational exposure as stated in the International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines. The specific absorption rate (SAR) at the positions of the cell culture dishes match the respective reference levels stated in the ICNIRP guidelines. In this paper, the coil design for the magnetic resonant coupling in the in vitro exposure system and characteristics, such as power transfer efficiency, electric field and magnetic field distributions, and SAR of the exposure system, are described.

Keywords

In vitro studyPower transfer efficiencyElectric and magnetic fieldsSARHFSS
Type
Research Article
Information
Wireless Power Transfer , Volume 1 , Issue 2 , September 2014 , pp. 97 - 107
Copyright
Copyright © Cambridge University Press 2014 

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References

REFERENCES

[1] World health Organization (WHO): Environmental Health Criteria 137: Electromagnetic Fields (300 Hz–300 GHz), WHO Press, Geneva, Switzerland, 1993, Available from http://www.inchem.org/documents/ehc/ehc/ehc137.htm [Last accessed 7 May 2014].Google Scholar
[2] International Commission on Non-Ionizing Radiation Protection (ICNIRP): Guidelines for limiting exposure to time-varying electric, magnetic and electromagnetic fields (up to 300 GHz). Health Phys., 74 (4) (1998), 494–522.Google Scholar
[3] International Commission on Non-Ionizing Radiation Protection (ICNIRP): Guidelines for limiting exposure to time-varying electric and magnetic fields (1 Hz–100 kHz). Heath Phys., 99 (6) (2010), 818–836.Google Scholar
[4] Shinohara, N.: Power without Wire. IEEE Microw. Mag., 12 (7) (2011), S64–S73.Google Scholar
[5] Kurs, A.; Karalis, A.; Moffatt, R.; Joannpoilos, J.D.; Fisher, P.; Soljacic, M.: Wireless power transfer via strongly coupled magnetic resonances. Sci. Mag., 317 (5834) (2007), 83–86.Google Scholar
[6] Karalis, A.; Joannopoulos, J.D.; Soljacic, M.: Efficient wireless non-radiative mid-range energy transfer. Ann. Phys., 323 (1) (2008), 34–48.Google Scholar
[7] Shinohara, N.: Wireless power transmission progress for electric vehicle in Japan. IEEE Radio and Wireless Symp. (RWS), 2013, 109–111.Google Scholar
[8] Park, S.W.; Wake, K.; Watanabe, S.: Incident electric field effect and numerical dosimetry for a wireless power transfer system using magnetically coupled resonances. IEEE Trans. Microw. Theory Tech., 61 (9) (2013), 3461–3469.CrossRefGoogle Scholar
[9] Christ, A.: et al. Evaluation of wireless resonant power transfer systems with human electromagnetic exposure limits. IEEE Trans. Electromagn. Compat., 55 (2) (2013), 265–274.Google Scholar
[10] Chun, Y.: et al. Electromagnetic compatibility of resonance coupling wireless power transfer in on-line electric vehicle system. IEICE Trans. Commun., 97B (2) (2014), 416–423.Google Scholar
[11] World health organization (WHO): Environmental Health Criteria 238: Extremely Low Frequency Fields, WHO Press, Geneva, Switzerland, 2007, Available from http://www.who.int/peh-emf/publications/elf_ehc/en/ [Last accessed 7 May 2014]Google Scholar
[12] Miyakoshi, J.; Ohtsu, S.; Miyajima, J.; Takebe, H.: A newly designed experimental system for exposure to mammalian cells to extremely low frequency magnetic fields. J. Radiat. Res, 35 (1) (1994), 26–34.CrossRefGoogle ScholarPubMed
[13] Miyakoshi, J.; Ohtsu, S.; Shibata, T.; Takebe, H.: Exposure to magnetic field (5 mT at 60 Hz) does not affect cell growth and c-myc gene expression. J. Radiat. Res., 37 (3) (1996), 185–191.Google Scholar
[14] Yamazaki, K.; Fujinami, H.; Shigemitsu, T.; Nishimura, I.: Low stray ELF magnetic field exposure system for in vitro study. Bioelectromagnetics, 21 (2) (2000), 75–83.Google Scholar
[15] Fujita, A.; Kawahara, Y.; Inoue, S.; Omori, H.: Development of a higher power intermediate frequency magnetic field exposure system for in vitro studies. Bioelectromagnetics, 31 (2) (2010), 156–163.CrossRefGoogle ScholarPubMed
[16] Mizuno, Y.; Koizumi, M.; Komurasaki, K.; Arakawa, Y.: Magnetic Resonance Power Transmission in Space Closed by a Metal. Technical Report of IEICE, (2011), WPT2011-02(2011-07).Google Scholar
[17] Yamakawa, M.; Mizuno, Y.; Ishida, J.; Koizumi, H.; Komurasaki, K.: Wireless Power Transmission to Enclosed Metallic Region by Magnetically Resonant Coupling. Technical Report of IEICE, (2013), WPT2013-02(2013-04).Google Scholar
[18] Imura, T.; Okabe, H.; Uchida, T.; Hori, Y.: Study of magnetic and electric coupling for contactless power transfer using equivalent circuits. Inst. Electr. Eng. Japan, 130 (1) (2010), 84–92.Google Scholar
[19] Hirayama, H.; Amano, T.; Kikuma, N.; Sakakibara, K.: An investigation on self-resonant and capacitor-loaded helical antennas for coupled-resonant wireless power transfer. Inst. Electron. Inf. Commun. Eng., E96B (10) (2013), 2431–2439.Google Scholar
[20] Imura, T.; Okabe, H.; Uchida, T.; Hori, Y.: Wireless power transfer during displacement using electromagnetic coupling in resonance. Inst. Electr. Eng. Japan, 130 (1) (2010), 76–83.Google Scholar
[21] Miyakoshi, J.; Horiuchi, E.; Nakahara, T.; Sakurai, T.: Magnetic fields generated by an induction heating (IH) cooktop do not cause genotoxicity in vitro. Bioelectromagnetics, 28 (7) (2008), 529–537.Google Scholar
[22] Sakurai, T.; Yoshimoto, M.; Koyama, S.; Miyakoshi, J.: Exposure to extremely low frequency magnetic fields affects insulin-secreting cells. Bioelectromagnetics, 29 (2) (2007), 118–124.Google Scholar
[23] Sakurai, T.; Narita, E.; Shinohara, N.; Miyakoshi, J.: Intermediate frequency magnetic field at 23 kHz does not modify gene expression in human fetus-derived astroglia cells. Bioelectromagnetics, 33 (8) (2012), 662–669.Google Scholar
[24] Awai, I.: BPF theory-based design method for wireless power transfer system by use of magnetically coupled resonators. Inst. Electr. Eng. Japan, 130 (12) (2010), 2192–2197.Google Scholar